Seiko Cal. 5618 - 731

Released in 1984, the Cal. 5618 with design code 731 was part of Seiko's domestic market collection. It features a Champagne dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-de15afb1f96e]

Also known as: World Timer, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Champagne

Jewels

36j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1984

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